Airlines raked in over 2.5 billion dollars in baggage fees last year, indicating that you're probably paying a lot more for your baggage than you need to. Just like you add shipping costs to your total before buying goods online, start adding on baggage costs to your tickets to avoid incurring additional travel expenses you didn't expect.

The agony-reducing flight search Hipmunk just put together a neat infographic showing the ridiculous baggage fees from many of the major airlines. It indicates that bags are costing you hundreds of dollars, but not on every airline. Southwest, for example, lets you check two bags for free, and JetBlue gives you a single bag. Before you book the cheapest flight, remember to check how much your bags will cost you. The price of your ticket could suddenly become significantly higher.

For more information on the state of baggage fees, check out the full infographic over at the Hipmunk Blog.